update database and tool list
Listeners for admin tools.
Adding custom installer.
Merge branch 'master' of github.com:claroline/CoreBundle into refactoring-administration
Merging migrations + plugin installer.
Uncomments.
adding role_management to the database
tools right matrix for administration
translations
Roles can be created
Fix 'Description : undefined' in Agenda if event has no description
Voter.
Merge branch 'master' of github.com:claroline/CoreBundle into refactoring-administration

Conflicts:
	Repository/RoleRepository.php
Check the right permissions for the 4 first admin tools.
WorkspaceRegistration.
Tools plugin
HomeTab
Logs & tools
Analytics
RolesController.